Xu Yubing, Wang Xin, Liu Shilin, Pan Yuzhu, Perveen Abida, Onwudiwe Damian Chinedu, Fayemi Omolola Esther, Elemike Elias Emeka, Bae Byung Seong, Zhu Ying, Talaighil Razika Zair, Zhang Xiaobing, Chen Jing, Zhao Zhiwei, Li Qing, Lei Wei, Xu Xiaobao
School of Electronic Science and Engineering Joint International Research Laboratory of Information Display and Visualization, Southeast University, Nanjing 210000, China.
Department of Chemistry, School of Mathematics and Physical Sciences Faculty of Natural and Agricultural Sciences, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
ACS Appl Mater Interfaces. 2023 Dec 6;15(48):56526-56536. doi: 10.1021/acsami.3c13305. Epub 2023 Nov 28.
Sensitive thermometry or thermography by responding to blackbody radiation is urgently desired in the intelligent information life, including scientific research, medical diagnosis, remote sensing, defense, etc. Even though thermography techniques based on infrared sensing have undergone unprecedented development, the poor compatibility with common optical components and the high diffraction limit impose an impediment to their integration into the established photonic integrated circuit or the realization of high-spatial-resolution and high-thermal-resolution imaging. In this work, we present a sensitive temperature-dependent visible photon detection in Bi-doped MAPbX (X = Cl, Br, and I) and employ it for uncooled thermography. Systematic measurements reveal that the Bi dopant introduces trap states in MAPbX, thermal energy facilitates the carriers jumping from trap states to the conduction band, while the vacancies of trap states ensure the sequential absorption of visible photons with energy less than the band gap. Subsequently, the change of response toward the visible photon is applied to construct the thermograph, and it possesses a specific sensitivity of 2.11% K along temperature variation. As a result, our thermograph presents a temperature resolution of 0.21 nA K, a high responsivity of 2.06 mA W, and a high detectivity of 2.08 × 10 Jones at room temperature. Furthermore, remote thermal imaging is successfully achieved with our thermograph.
在智能信息生活中，包括科学研究、医学诊断、遥感、国防等领域，迫切需要通过响应黑体辐射来实现灵敏的温度测量或热成像。尽管基于红外传感的热成像技术取得了前所未有的发展，但与普通光学元件的兼容性差以及高衍射极限阻碍了它们集成到现有的光子集成电路中，也阻碍了高空间分辨率和高热分辨率成像的实现。在这项工作中，我们展示了在掺铋的MAPbX（X = Cl、Br和I）中实现与温度相关的灵敏可见光子探测，并将其用于非制冷热成像。系统测量表明，铋掺杂剂在MAPbX中引入了陷阱态，热能促使载流子从陷阱态跃迁到导带，而陷阱态的空位确保了能量小于带隙的可见光子的顺序吸收。随后，利用对可见光子响应的变化构建热成像图，其沿温度变化具有2.11% K的特定灵敏度。结果，我们的热成像图在室温下呈现出0.21 nA K的温度分辨率、2.06 mA W的高响应度和2.08×10琼斯的高探测率。此外，我们的热成像图成功实现了远程热成像。
